Not all Chart values are shown

I'm using the sample from
this discussion and essentially expanding the data that needs to be shown in the chart. However, the chart is not displaying anything beyond the second column (column D).

I've tried different ways to go about it -

Removed the middle column, changed the headings of the labels and categories and also outputted the plotValues using the getPlotValues() function to see if the proper description got populated, and there's no luck in figuring out why all series values are
not being selected for the chart.